Positives

  • Excellent Flex retention
  • Excellent Heel Hold

Negatives

  • Below Average Shock Absorption

Summary

The K2 Thraxis doesn't have great shock absorption but is a stiff, long-lasting boot with excellent heel hold and great adjustability. Three BOAs also increase the chances of failure for those who are hard on their boots.

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Riding Level Advanced - Expert
Lacing Type Double BOA
Manufactured in China
Flex Retention Excellent
Shock Absorption Average
Traction Great
On & Off Ease Great
Warmth Great
Flex Stiff
Turn Initiation Fast
Sizing 1/2 Size Large
Boot Width Medium
Comfort Great
Heel Hold Excellent
Adjustability Great
Reduced Footprint Great

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K2 Thraxis 2020 - 2010 Review by The Good Ride

Ethics Statement

We don’t get paid by the manufacturer to write these reviews.  No one is perfect, and we do make money from the “Where To Buy” links below, but this is our best attempt at an honest and objective review from an average rider’s perspective.

Flex/Response

This is a pretty stiff boot, right up there with any other stiff boot in the industry. The response matches the flex as well and it’s up there. Maybe not a 10 out of 10, but definitely a 9, but it lasts a long time. I will say that boots this responsive just don’t work that well for me because they can overpower boards and make them feel twitchy/hooky. However, if you like tons of responses for demanding boards, this could work.

Flex Retention

While there is minimal ankle articulation, there are other really cool things that make the K2 Thraxis last a long time. They have a pretty burly urethane spine that does not break down, and that, along with good overall construction, makes for a pretty long-lasting ride.

Fit

The K2 Thraxis does a pretty good job fitting my 9 E feet. It’s tighter around the ankle but opens up very well in the toe box to accommodate wider feet. It does run about 1/2 size too big, so I find the 8.5 fit’s a true size 9 E much better.

Heel Hold

If you are worried about heel hold, then the K2 Thraxis will lock in even a smaller heel/ankle and keep you secure. It starts with the BOA system in the liner and then goes to the double boa system that overlaps on the ankle on the outside.  There aren’t many boots that can lock you in like this.

Adjustability

You have about all you can get from BOA here. You have upper/lower separation and then a coil inside to really wrap around your ankle.

On/Off

It’s not quick on but pretty fast off. BOA is just not that fast on, so adding three BOAs to it doesn’t help much.

Traction

No complaints here with the K2 Thraxis. Vibram is just badass and works well anywhere from the parking lot to a rocky frozen peak.

Reduced Footprint

The newer years have done a good job of reducing their footprint. If you compare an 8.5 K2 Thraxis to any 9 Burton, it’s pretty close to Burton.

Shock Absorption

The sole looks like it would be pretty cush but it’s pretty stiff. It is for those that like that skate/surf feel underfoot where you get more board feel/response but less shock absorption.

Conclusion

So

 
K2 Thraxis Past Reviews

The 2011 and 2012 K2 Thraxis are pretty similar barring a few minor adjustments and both are great boots….especially for their time.

The 2013 K2 Thraxis has one big change to the build that makes this a much better boot.  The addition of Urethane throughout most of the boots frame is a great idea. It’s a smart approach to dealing with preservation of the flex.  It’s like having a lot of ankle articulation. This is for sure the call over the older models

 
K2 Thraxis Specs

 
K2 Thraxis Images

We try to get as many images of the K2 Thraxis, but forgive us if they're not all there.

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K2 Thraxis User Reviews

K2 Thraxis Snowboard Boot Review SKU UPC Model

This boot is a beast

Jan 08, 2019 by Akalacka
Ability Level: Expert • 
Riding Style: All mountain • 
Days You Ride A Year: 50 • 
Height, Weight And Boot Size (for Boards, Boots & Bindings): 6', 190, size 10 

Not sure these guys actually rode this boot? Or even tried to put it in a binding?

I disagree on two major points. First, the footprint is not bulky. At all! It is on par with Burton's reduced size. I have a ten in this and it easily fits in Burton and Now medium bindings.

Second, the boa is much more separated than they would have you believe. There is no actual overlap at all between the upper and lower cables. Perhaps what they are referring to is that both sections have an effect on your ankle because of how stiff the tongue is. But I find the adjustability to be great.

Other thoughts: the flex on the boot is amazing. It is as stiff as you want it to be, but that lets you run it without cranking everything down, so you foot feels great. Also, for me the shape is perfect. Carving or flexing the boot hard it distributes pressure very evenly and creates zero pressure points. Like they say though, try on literally EVERY boot you can, and really try to flex them hard in the shop, because those pressure points or lack thereof are totally dependent on your foot/ankle/leg shape.

Sizing seems true to the other boots I've ridden (most recently a few Burtons, I am a ten in those as well.) Of course though be sure to try on a wide range of sizes. Remember you should be sizing down from normal sneaker size.

One note if you're trying this on: The inner boa has a moveable plate that velcros to the shell and adjusts where the pressure is applied for heel hold. Moving this makes a huge difference. Even just a few millimeters. If you feel instep pressure try moving that up.

Finally, as is usual the stock insoles are completely worthless. I put the sole performance thin in mine. Great arch support, they take up a bit of heel volume but pretty much leave the toe box alone. K2 have a lot of room in the heel so it is good to suck some of that up.


From hate to love

Nov 06, 2015 by Tim Abenath
Ability Level: Advanced • 
Riding Style: All Mountain • 
Days You Ride A Year: 30 days • 
Height, Weight And Boot Size (for Boards, Boots & Bindings): 1,83cm,90kg,size 10,5 

I ride these boots now for the second year.....They really fit my foot perfect but I did hate the inside tongue witch supposed to be for the perfect heel hold! Don´t get me wrong....nothing against heel hold but you wrap this green tongue around your feet with steelcabels witch are running trough hardplastik tupes ! So guess what happens when you crank that System to get the promised heelhod....
Yes, pressure points that you never had before...
So this is really unacceptable and stupid ingeniering from K2 ! So when I bought these boots I ended up cutting out that system of the boots directly in my Hotel room after a day of bad pain and testing all possible setups to avoid these pressure points. From there on it was really a perfect feeling !
I never had problems again with these stiff killers....The boot worked perfect and for me even much better without the tongue thight system.


4.5 5.0 2 2 Not sure these guys actually rode this boot? Or even tried to put it in a binding? I disagree on two major points. First, the footprint is not bulky. At all! It is on par with B K2 Thraxis Snowboard Boot Review

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